Interactive modyfying the method set of a geometric constraint

In the paper, a way of making geometric constraints more flexible is described. This approach is employed in our new interactive 2D constraint-based drawing system. Multidirectional constraints should be very powerful to find exactly the results expected by a user when more than one solution is possible. By defining constraint method priorities, we can satisfy some designer's intents but not all of them. So we leave a possibility to reorder method lists of particular constraints to the user. Two new terms: parallel and alternative methods are also introduced. Finally, we present some basic characteristics of two our geometric constraint solving systems